[RyanB]

The best way to determine what tools you bring to regionals is to keep track of all the tools you use durring the build. What have placed a tool rack in out crate which we keep in our robotics room, and whenever we use something we put it up on the rack so we can keep track of everything. For example because we use extruded aluminium and Bosch hardware we have a hook for 4mm allen wrenches, and for bolts we use 1/4-20 bolts with a 7/16 inch hex head so we keep a couple 7/16 inch wrenches. It all depends on what your team needs to build a robot.
Also dont forget spare safety glasses, Safety First